GIT reset head to a previous commit http://stackoverflow.com/questions/9529078/how-do-i-use-git-reset-hard-head-to-revert-to-a-previous-commit

git

git log (get the commit id that you want to reset to)
git reset --hard "commit id"
git reset --soft HEAD@{1}
git commit -m "Reverting to the state of the project at commit id"
git push